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Abstract:

The invention relates to a lock comprising a lockable knob, formed by a
closure tongue (1) non-rotatably mounted on the shaft of a cylinder (2)
which rotates in a casing (3) under the action of a knob (4). The knob
(4) is mounted on the cylinder (2) and casing (3) such that it can move
linearly between two end positions, namely an operating position and a
locked position. The casing (3) and the knob (4) include at least two
geometrically arranged linear guides (33, 43) which, during the linear
movement of the knob (4), are engaged with, or released from one another.
In addition, the cylinder (2) and the knob (4) include radial openings
(20, 40) which are positioned coaxially in the locked position and offset
axially in the operating position. The cylinder (2) and the casing (3)
include geometrically arranged cams (22, 32) which limit the rotational
movement of the cylinder (2) in the casing (3) between the tongue (1)
-opening and -closing positions.

Claims:

1. A lock comprising a lockable knob, structured in a closure tongue (1)
non-rotatably mounted on the shaft of a cylinder (2) that rotates in a
casing (3) when a knob (4) joined to it does so and characterized in
that: a) the knob (4) is mounted on the cylinder (2) and casing (3) with
the possibility of being moved linearly, guided between two end positions
of operation and locking. b) the casing (3) and the knob (4) have at
least two geometrically arranged linear guides (33), (43) that, in the
linear movement of the knob (4), are engaged with or are released from
each other. c) the cylinder (2) and the knob (4) each have radial
openings (20), (40) that are coaxial--to lock between them the knob (4)
and cylinder (2) in locking position--or axially offset--to allow the
operation of the lock d) the cylinder (2) and the casing (3) each have
geometrically arranged cams (22), (32) that limit the rotational movement
of the cylinder (2) on the casing (3) between the opening and closing
positions of the tongue (1).

2. A lock comprising a lockable knob, according to claim 1, characterized
in that, to limit the path of said guided linear movement of the knob
(4): the body (21) of the cylinder (2) presents extra-flat configuration,
with an axially slotted orifice (210); the body (41) of the knob (4)
presents radial housing (410) in which said body (21) of the cylinder (2)
is housed jointly; and there is a shaft-pin (5) fastened to the body of
the knob (4) and housed in the axially slotted orifice (210)

Description:

[0001] The present invention refers to a lock comprising a lockable knob,
such as the type used in keyless lockers.

[0002] In the current state of the art, keyless locks that open/close an
enclosure or locker by simple turning action of the knob are already
known.

[0003] In locks with this type of operation, to prevent them from going
from the opening position to the closing position or vice versa, and to
maintain the lock in locked positions, it is necessary to lock the
rotation with respect to the casing, of at least one of the two main
parts (knob or cylinder). In known locks, this locking is generally
achieved by locking the knob in the casing and unlocking is achieved by
simply releasing the lock to allow the knob to turn, and with it the
cylinder (the knob and the cylinder do not move in relation to each
other).

[0004] With the lock that is the object of the invention, the knob is
mounted on the casing and can be moved linearly, guided between two end
positions of operation and locking for which the casing and the knob have
at least two geometrically arranged linear guides which, in the linear
movement of the knob with respect to the casing, are engaged with or are
released from each other. The locking is achieved by locking the knob
guide lodged in the casing guide--or vice versa- and the unlocking is
achieved by simple linear movement of the knob until both guides are
released from each other.

[0005] With the lock that is the object of the invention, the knob is
mounted on the cylinder and can be moved linearly, guided between two end
locked and unlocked positions for which: [0006] a) The cylinder has a
slotted axial orifice and the knob has a pin shaft guided on it--or vice
versa, and [0007] b) The knob and the cylinder each have radial orifices,
one in the knob and the other in the cylinder.

[0008] The locked position is obtained by fixing the knob and cylinder
with respect to each other in the position in which said radial orifices
are coaxial and the unlocked position is obtaining by linearly moving the
knob with respect to the cylinder to axially offset said radial orifices.

[0009] The advantages of this new lock, according to the invention, are
obvious because its structure is simplified and a minimum number of
components are used: only a knob, cylinder, casing, (as well as the
closure tongue itself connected to the cylinder and a commercial lock).

[0010] Therefore, the suggested lock comprises a new invention that
involves inventive activity, and can be applied industrially.

[0011] To better understand the object of the present invention, a
preferential form of practical embodiment is represented in the diagrams,
subject to accessory changes that do not alter its basic principle.

[0012]FIG. 1 represents a general schematic perspective view of the lock
that is the object of the invention, with its components in closed and
locked position.

[0013]FIG. 2 represents a general schematic perspective view, similar to
the foregoing figure, with its components in opening and unlocked
position.

[0014]FIG. 3 represents a general schematic perspective view similar to
FIG. 1 but without the casing (3) or the closure tongue (1).

[0015] FIG. 4 represents a general schematic perspective view similar to
FIG. 2 but without the casing (3) or the closure tongue (1).

[0017] Described below is an example of practical, non-limiting embodiment
of the present invention. Other forms of embodiment in which accessory
changes that do not alter its basic principle are in no way disregarded;
on the contrary, the present invention encompasses all its variations.

[0018] The present invention involves a new lockable knob lock, comprised
basically of a closure tongue (1), a cylinder (2), a casing (3) and a
knob (4) as well as a commercial lock.

[0019] According to the invention, and according to the embodiment
represented, the casing (3) is a single-piece structure with at least a
primary linear guide (33) and a primary circumferential cam (32), in
addition to the known means/openings (34) to be mounted at the place of
operation.

[0020] According to the invention, and according to the embodiment
represented, the cylinder (2 is a single-piece structure with a second
circumferential cam (22) formed in its head (23) and a body (21) of
extra-flat configuration with an axially slotted opening (210) in its
central zone and a primary radial opening (20) in its back zone.

[0021] The closure tongue is placed in the front of said cylinder (2). The
structure, function and placement of this closure tongue (1) in the
cylinder (2) are known; therefore, it is not described in further detail.

[0022] According to the invention, and according to the embodiment
represented, the knob (4) is a single-pieced structure, with a body of
revolution (41) with an outer second liner guide (43) and radial housing
(410) inside; with an ergonomic head (42) presenting a second radial
opening (40).

[0023] The assembly between the knob (4) and the cylinder (2) allowing
relative linear movement between them takes place by placing, fastened on
the body (41) of the knob, (4) a shaft-pin (5) that passes through the
axially slotted opening (210) made in the body of the cylinder (2).

[0024] The locking and operation positions of the knob (4) on the casing
(3) are achieved by linear movement of the knob (3) with respect to the
casing (3), respectively, the linear guides (33) (43) being engaged
between them.